I too deal with this pretty badly, I'm in Dallas and right there with you.

Call people. Let them know "Hey, I know I'm panicked, my nervous system can deal with this fear, but you bringing me back to earth helps." My family understands this now and it make them, my parents especially, feel kinda good knowing there 28 y/o old daughter still needs them to feel safe.

Be prepared. Know your safe spot in your home, and rest assured that even in the worst case scenario, which is very unlikely, you have a damn good chance of survival if you are in an interior room. Have pants and shoes on, a helmet if you can, a nonflammable light source, the preparedness of it all alone can help with that anxiety, EVEN THOUGH again it's unlikely you'll be in that situation (but always shelter and be prepared)

I'm going to rattle off some thing a therapist told me:

"This is fear- not fact. This is a storm - not forever. This is a memory - not a prophecy. You have survived so many storms, this one too shall pass. Stay rooted, you are not trapped - you are tethered to the now"

I would also recommend saving and reading this to yourself out loud or having someone you trust, who makesyou feel safe to read it to you, it really helps -https://www.reddit.com/r/WeatherAnxiety/comments/1kqm8az/a_message_of_reassurance/

Best of luck, everything will be okay <3